CN106399839A - Large-thickness, high-strength and high-tenacity NM400 steel plate and production method - Google Patents
Large-thickness, high-strength and high-tenacity NM400 steel plate and production method Download PDFInfo
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- CN106399839A CN106399839A CN201610827438.6A CN201610827438A CN106399839A CN 106399839 A CN106399839 A CN 106399839A CN 201610827438 A CN201610827438 A CN 201610827438A CN 106399839 A CN106399839 A CN 106399839A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Abstract
The invention discloses a large-thickness, high-strength and high-tenacity NM400 steel plate and a production method. The steel plate comprises following chemical components including, by weight percent, 0.17%-0.20% of C, 0.25%-0.45% of Si, 1.20%-1.40% of Mn, smaller than or equal to 0.012% of P, smaller than or equal to 0.005% of S, 0.40%-0.60% of Cr, 0.40%-0.50% of Mo, 0.80%-1.00% of Ni, 0.020%-0.050% of Al, 0.001%-0.002% of B, 0.010%-0.030% of Ti and the balance Fe and inevitable impurities. The production method comprises the smelting continuous casting procedure, the heating procedure, the rolling procedure and the heat treatment procedure. The maximum thickness of the large-thickness, high-strength and high-tenacity NM400 steel plate can reach 110 mm, and the large-thickness, high-strength and high-tenacity NM400 steel plate has the beneficial effects that the strength is moderate, the position of 1/4 of the plate thickness is good in impact toughness at the low temperature of minus 40 DEG C, and wide application prospects are achieved.
Description
Technical field
The invention belongs to metallurgical technology field is and in particular to a kind of big thick and high-strength high tenacity NM400 steel plate and producer
Method.
Background technology
NM400 steel plate has higher intensity and hardness, is widely used in the engineering machinery such as mine, colliery, metallurgy main
In wear-resisting workpiece processing and production.Such steel plate not only higher-strength to be had and hardness, but also to have certain toughness and good
Good welding performance, the NM400 steel plate that current China produces is producing with like products such as Japan of overseas enterprise JFE, Sweden SSAB
Also there is the big gap of friendship in the aspect such as product performance uniformity and low-temperature flexibility.For improving the performance of steel plate, generally in composition design
Improve alloy content, which not only adds cost, compromise the welding performance of material simultaneously again.
Along with engineering machinery to the development maximized, simultaneously for ensureing the life-span of steel plate to greatest extent, to abrasion-resistant stee
Thickness, especially p- 40 DEG C of low temperature impact properties propose requirements at the higher level.The NM400 abrasion-resistant stee that China produces at present mainly collects
In between thickness 8mm-80mm, and standard GB/T/T24186-2009 that China 2009 formulates, this steel grade is only required-
20 DEG C of impacts of collision, Wuyang Iron ＆ Steel Co., Ltd. successfully have developed 60mm thickness WNM400E in 2011, its -40 DEG C
Impact of collision work(can reach 50-120J, and at present, the performance of this above-mentioned steel grade can not meet the demand of downstream client, therefore,
The industry urgently develops a kind of wear-resisting steel plate of big thick and high-strength degree high tenacity.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of big thick and high-strength high tenacity NM400 steel plate and production method,
This NM400 steel plate maximum gauge reaches 110mm, obdurability is excellent, low-temperature impact toughness is good, uniform with plate hardness.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that：A kind of big thick and high-strength high tenacity NM400 steel
Plate, described steel plate is made up of the chemical constituent of following weight percentage：C：0.17-0.20%, Si：0.25-0.45%, Mn：
1.20-1.40%, P≤0.012%, S≤0.005%, Cr：0.40-0.60%, Mo：0.40-0.50%, Ni：0.80-1.00%, Al：
0.020-0.050%, B：0.001-0.002%, Ti：0.010-0.030%, balance of Fe and inevitable impurity.
Steel plate maximum gauge of the present invention is 110mm.
Steel plate yield strength >=950MPa of the present invention, tensile strength >=1200MPa, elongation percentage A50%≥10%；-40℃
20 joules of impact of collision work(.
Surface of steel plate Brinell hardness of the present invention is 360-440HB.
The present invention also provides a kind of production method of above-mentioned big thick and high-strength high tenacity NM400 steel plate, described producer
Method includes smelting continuous casting working procedure, heating, rolling process and heat treatment step；Described smelting continuous casting working procedure gained continuous casting billet is by following
The group of weight percentage is grouped into：C：0.17-0.20%, Si：0.25-0.45%, Mn：1.20-1.40%, P≤0.012%, S≤
0.005%, Cr：0.40-0.60%, Mo：0.40-0.50%, Ni：0.80-1.00%, Al：0.020-0.050%, B：0.001-
0.002%, Ti：0.010-0.030%, balance of Fe and inevitable impurity.
Heating process of the present invention, heating-up temperature≤1240 DEG C it is ensured that steel billet is grilled thoroughly, soaking temperature 1220-1240 DEG C,
Soaking zone insulation >=50min, total heat time heating time >=10min/cm.Cm refers to be the thickness of strand herein.
Rolling process of the present invention adopts controlled rolling to roll, 1050-1150 DEG C of first stage start rolling temperature, and the steel thickness that dries in the air is
Steel plate thickness+50mm；Second stage start rolling temperature≤950 DEG C, it is cold to enter water control after rolling, 650-750 DEG C of red temperature.
Heat treatment step of the present invention adopts quenching+lonneal technique, and hardening media is water.
In heat treatment step of the present invention, hardening heat is 910 ± 10 DEG C；Temperature is 200 ± 10 DEG C, during insulation
Between be (4.0～4.5) × t minute, t be steel plate mm of thickness；After insulation, air cooling is obtained big thick and high-strength high tenacity NM400 steel
Plate.
Rolling process of the present invention, rolls rear stacking slow cooling, more than 48 hours stacking time.
Using having the beneficial effects that technique scheme produces：1st, the present invention adopts the design of low C and low-alloy composition
Thinking, by adding micro- conjunction element gold niobium, titanium in right amount, and combines cooling controlling and rolling controlling process, and crystal grain thinning is uniformly tiny to obtain
Organizational structure, thus improve the low temperature impact properties of steel plate further.2nd, the steel plate maximum gauge that the present invention obtains is 110mm,
Yield strength >=950MPa, tensile strength >=1200MPa, elongation percentage A50%≥10%；- 40 DEG C of impact of collision work(>=20J, steel plate table
Face Brinell hardness 360-440HB.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
The thickness of this steel plate is 110mm, is made up of the chemical composition of following weight percentage：C：0.17%, Si：0.35%, Mn：
1.25%, P：0.012%, S：0.002%, Cr：0.45%, Mo：0.43%, Ni：0.84%, Al：0.030%, B：0.0012%, Ti：
0.013%, balance of Fe and inevitable impurity.
The production method of this steel plate comprises to smelt continuous casting working procedure, heating process, rolling process, heat treatment step, each operation
Step is as follows：
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed in LF refining furnace carrying out refine and passing through
Application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm；
（2）Heating process:1235 DEG C of heating-up temperature, 1225 DEG C of soaking temperature, soaking zone is incubated 55min, total heat time heating time 385
Minute；
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, 1055 DEG C of start rolling temperature,
Second stage is the austenite non-recrystallization stage, and the steel thickness that dries in the air is 160mm, and start rolling temperature is 910 DEG C, enters water cooling, return after rolling
710 DEG C of red temperature.Roll rear stacking slow cooling, 52 hours stacking time；
（4）Heat treatment step：Steel plate is processed through quenching and lonneal, and described quenching and tempering, high plate is obtained；Wherein, quench
Temperature is 910 DEG C, and hardening media is water；Temperature is 205 DEG C, and temperature retention time is 450min, air cooling of coming out of the stove.
The mechanical property of steel plate is：Rp0.2：1020MPa、Rm：1320MPa、A50：13.0%th, -40 DEG C when longitudinal Akv 65J,
Case hardness 394HB.
Embodiment 2
The thickness of this steel plate is 110mm, is made up of the chemical composition of following weight percentage：C：0.18%, Si：0.35%, Mn：
1.32%, P：0.010%, S：0.002%, Cr：0.52%, Mo：0.45%, Ni：0.90%, Al：0.039%, B：0.0016%, Ti：
0.019%, balance of Fe and inevitable impurity.
The production method of this quenching and tempering, high plate comprises to smelt continuous casting working procedure, heating rolling operation, heat treatment step, each work
Sequence step is as follows：
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed in LF refining furnace carrying out refine and passing through
Application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm；
（2）Heating process:1240 DEG C of heating-up temperature, 1230 DEG C of soaking zones of soaking temperature are incubated 65min, 370 points of total heat time heating time
Clock；
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, 1100 DEG C of start rolling temperature,
Second stage is the austenite non-recrystallization stage, and the steel thickness that dries in the air is 160mm, and start rolling temperature is 890 DEG C, enters water cooling, return after rolling
690 DEG C of red temperature.Roll rear stacking slow cooling, 50 hours stacking time；
（4）Heat treatment step：Steel plate is processed through quenching and lonneal, and described quenching and tempering, high plate is obtained；Wherein, quench
Temperature is 910 DEG C, and hardening media is water；Temperature is 210 DEG C, and temperature retention time is 480min, air cooling of coming out of the stove；
The mechanical property of steel plate is Rp0.2：1100MPa、Rm：1380MPa、A50：11.5%th, -40 DEG C when horizontal Akv 47J, surface
Hardness 420HB.
Embodiment 3
The thickness of this steel plate is 110mm, is made up of the chemical composition of following weight percentage：C：0.20%, Si：0.25%, Mn：
1.20%, P：0.002%, S：0.005%, Cr：0.60%, Mo：0.40%, Ni：1.00%, Al：0.050%, B：0.0010%, Ti：
0.010%, balance of Fe and inevitable impurity.
The production method of this steel plate comprises to smelt continuous casting working procedure, heating process, rolling process, heat treatment step, each operation
Step is as follows：
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed in LF refining furnace carrying out refine and passing through
Application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 330mm；
（2）Heating process:1225 DEG C of heating-up temperature, 1220 DEG C of soaking temperature, soaking zone is incubated 50min, total heat time heating time 330
Minute；
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, 1050 DEG C of start rolling temperature,
Second stage is the austenite non-recrystallization stage, and the steel thickness that dries in the air is 160mm, and start rolling temperature is 900 DEG C, enters water cooling, return after rolling
650 DEG C of red temperature.Roll rear stacking slow cooling, 48 hours stacking time；
（4）Heat treatment step：Steel plate is processed through quenching and lonneal, and described quenching and tempering, high plate is obtained；Wherein, quench
Temperature is 920 DEG C, and hardening media is water；Temperature is 200 DEG C, and temperature retention time is 440min, air cooling of coming out of the stove.
The mechanical property of steel plate is：Rp0.2：1000MPa、Rm：1250MPa、A50：12.0%th, -40 DEG C when longitudinal Akv 54J,
Case hardness 404HB.
Embodiment 4
The thickness of this steel plate is 100mm, is made up of the chemical composition of following weight percentage：C：0.18%, Si：0.45%, Mn：
1.40%, P：0.005%, S：0.003%, Cr：0.40%, Mo：0.50%, Ni：0.80%, Al：0.020%, B：0.002%, Ti：
0.030%, balance of Fe and inevitable impurity.
The production method of this steel plate comprises to smelt continuous casting working procedure, heating process, rolling process, heat treatment step, each operation
Step is as follows：
（1）Smelt continuous casting working procedure：Smelted using electric arc furnace or converter mode, be then fed in LF refining furnace carrying out refine and passing through
Application of vacuum；Cast out blank through continuous casting operation afterwards, obtain the continuous casting billet that thickness is 300mm；
（2）Heating process:1230 DEG C of heating-up temperature, 1240 DEG C of soaking temperature, soaking zone is incubated 60min, total heat time heating time 330
Minute；
（3）Rolling process：Using two-stage controlled rolling process, the first stage is the austenite recrystallization stage, 1150 DEG C of start rolling temperature,
Second stage is the austenite non-recrystallization stage, and the steel thickness that dries in the air is 150mm, and start rolling temperature is 950 DEG C, enters water cooling, return after rolling
750 DEG C of red temperature.Roll rear stacking slow cooling, 52 hours stacking time；
（4）Heat treatment step：Steel plate is processed through quenching and lonneal, and described quenching and tempering, high plate is obtained；Wherein, quench
Temperature is 900 DEG C, and hardening media is water；Temperature is 190 DEG C, and temperature retention time is 450min, air cooling of coming out of the stove.
The mechanical property of steel plate is：Rp0.2：1080MPa、Rm：1390MPa、A50：11.0%th, -40 DEG C when longitudinal Akv 69J,
Case hardness 435HB.
Above example is only in order to illustrative and not limiting technical scheme, although reference above-described embodiment is to this
Bright be described in detail, it will be understood by those within the art that：Still the present invention can be modified or wait
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
In the middle of sharp claimed range.
Claims (10)
1. a kind of big thick and high-strength high tenacity NM400 steel plate it is characterised in that described steel plate by following weight percentage change
Group is grouped into：C：0.17-0.20%, Si：0.25-0.45%, Mn：1.20-1.40%, P≤0.012%, S≤0.005%, Cr：
0.40-0.60%, Mo：0.40-0.50%, Ni：0.80-1.00%, Al：0.020-0.050%, B：0.001-0.002%, Ti：
0.010-0.030%, balance of Fe and inevitable impurity.
2. a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 1 it is characterised in that described steel plate
Big thickness is 110mm.
3. a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 1 is it is characterised in that described steel plate is bent
Take intensity >=950MPa, tensile strength >=1200MPa, elongation percentage A50%≥10%；- 40 DEG C of impact of collision work(>=20J.
4. a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 1 is it is characterised in that described steel plate table
Face Brinell hardness is 360-440HB.
5. the production method based on a kind of big thick and high-strength high tenacity NM400 steel plate described in claim 1-4 any one, its
It is characterised by, described production method includes smelting continuous casting working procedure, heating, rolling process and heat treatment step；Described smelting continuous casting
Operation gained continuous casting billet is grouped into by the group of following weight percentage：C：0.17-0.20%, Si：0.25-0.45%, Mn：
1.20-1.40%, P≤0.012%, S≤0.005%, Cr：0.40-0.60%, Mo：0.40-0.50%, Ni：0.80-1.00%, Al：
0.020-0.050%, B：0.001-0.002%, Ti：0.010-0.030%, balance of Fe and inevitable impurity.
6. a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 5 production method it is characterised in that
Described heating process, heating-up temperature≤1240 DEG C it is ensured that steel billet is grilled thoroughly, soaking temperature 1220-1240 DEG C, soaking zone insulation >=
50min, total heat time heating time >=10min/cm.
7. a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 5 production method it is characterised in that
Described rolling process adopts controlled rolling to roll, 1050-1150 DEG C of first stage start rolling temperature, and the steel thickness that dries in the air is steel plate thickness+50mm；
Second stage start rolling temperature≤950 DEG C, it is cold to enter water control after rolling, 650-750 DEG C of red temperature.
8. a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 5 production method it is characterised in that
Described heat treatment step adopts quenching+lonneal technique, and hardening media is water.
9. the production method of a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 5-8 any one, its
It is characterised by, in described heat treatment step, hardening heat is 910 ± 10 DEG C；Temperature is 200 ± 10 DEG C, and temperature retention time is
(4.0～4.5) × t minute, t is steel plate mm of thickness；After insulation, air cooling is obtained big thick and high-strength high tenacity NM400 steel plate.
10. the production method of a kind of big thick and high-strength high tenacity NM400 steel plate according to claim 5-8 any one,
It is characterized in that, described rolling process, rolls rear stacking slow cooling, more than 48 hours stacking time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610827438.6A CN106399839A (en) | 2016-09-18 | 2016-09-18 | Large-thickness, high-strength and high-tenacity NM400 steel plate and production method |
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| CN201610827438.6A CN106399839A (en) | 2016-09-18 | 2016-09-18 | Large-thickness, high-strength and high-tenacity NM400 steel plate and production method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099727A (en) * | 2017-03-31 | 2017-08-29 | 华南理工大学 | A kind of ultrafast cold press quenching production Thin Specs abrasion-resistant stee NM400 method |
| CN109023114A (en) * | 2018-09-29 | 2018-12-18 | 南京钢铁股份有限公司 | A kind of superelevation steel Q960E slab and manufacturing method |
| CN110564923A (en) * | 2019-09-23 | 2019-12-13 | 舞阳钢铁有限责任公司 | production method of quenched and tempered 27SiMn wear-resistant steel plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194684A (en) * | 2013-03-28 | 2013-07-10 | 宝山钢铁股份有限公司 | Wear-resistant steel plate and manufacture method thereof |
| CN104480406A (en) * | 2014-11-28 | 2015-04-01 | 宝山钢铁股份有限公司 | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof |
| CN105102656A (en) * | 2013-03-28 | 2015-11-25 | 杰富意钢铁株式会社 | Abrasion resistant steel plate having low-temperature toughness, and manufacturing method therefor |
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2016
- 2016-09-18 CN CN201610827438.6A patent/CN106399839A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194684A (en) * | 2013-03-28 | 2013-07-10 | 宝山钢铁股份有限公司 | Wear-resistant steel plate and manufacture method thereof |
| CN105102656A (en) * | 2013-03-28 | 2015-11-25 | 杰富意钢铁株式会社 | Abrasion resistant steel plate having low-temperature toughness, and manufacturing method therefor |
| CN104480406A (en) * | 2014-11-28 | 2015-04-01 | 宝山钢铁股份有限公司 | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099727A (en) * | 2017-03-31 | 2017-08-29 | 华南理工大学 | A kind of ultrafast cold press quenching production Thin Specs abrasion-resistant stee NM400 method |
| CN107099727B (en) * | 2017-03-31 | 2019-01-18 | 华南理工大学 | A kind of method of ultrafast cold press quenching production thin gauge abrasion-resistant stee NM400 |
| CN109023114A (en) * | 2018-09-29 | 2018-12-18 | 南京钢铁股份有限公司 | A kind of superelevation steel Q960E slab and manufacturing method |
| CN110564923A (en) * | 2019-09-23 | 2019-12-13 | 舞阳钢铁有限责任公司 | production method of quenched and tempered 27SiMn wear-resistant steel plate |
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Application publication date: 20170215 |